JPH0375908A - Production of grip - Google Patents

Abstract

PURPOSE:To improve the work efficiency by arranging a grip skin material having a prescribed form like a bag in a prescribed position in a grip forming mold and injecting a resin or the like into this mold to form a grip core material in the grip surface material as one body. CONSTITUTION:A cylindrical grip skin material 34 is preliminarily seamed by a machine. This material 34 has the margin to seam put on the inside and is arranged in a prescribed position in a grip forming mold 40. A hot runner mold 44 is moved left, and it is stopped when a front end part 46a of a core 46 supported and fixed in the hot runner mold 44 is stored in a recessed part 42c of divided molds 42a and 42b. The material 34 is clipped between divided molds 42a and 42b and the mold 44 through resin supply paths 44a and 44b of the hot runner mold 44. The fused resin is injected into molds 42a and 42b to form a grip core member 32. Thereafter, molds 42a and 42b are separated from each other and the mold 44 is drawn back, and a formed grip part 30 is separated from the core 46 to form the grip part 30 along the axis.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method of manufacturing a grip such as a parking brake operating lever for a vehicle or a shift lever for shifting gears.

[Prior Art] FIG. 3 is an explanatory perspective view showing an example of a grip portion of a conventional parking brake operating lever, and FIG. 4 is an explanatory cross-sectional view taken along the line IV-IV in FIG. 3. .

In the example shown in the figure, the grip portion 20 is manufactured through the following steps.

(a) First, a thick cylindrical resin grip core part 22 is press-fitted and fixed onto the outer periphery of the gripping cylinder part 12 formed by curling the tip side of the lever body 10 into a cylindrical shape.

(W) Next, a leather or cloth-like grip skin member 24 is wrapped around the grip core member 22, and its inner surface is fixed to the outer peripheral surface of the grip core shell 22 with adhesive,
Furthermore, both end side edges of the grip skin member 24 are sewn by hand. In addition, the tip of the grip skin part shrine 24 (
The head) edge 24a is folded along the grip core member 22 and the inner wall of the hollow part of the gripping tube 12, and the cylindrical cap member 26 is further fitted inside of it, and the tip edge 24a of the grip skin member 24 is folded. securely fixed.

Such a grip skin member 24 is provided for the purpose of improving the tactile sensation of gripping the grip portion 20, unifying the design of the grip portion 20 with the seat, etc., and further enhancing the luxurious feel of the vehicle interior. It is.

[Problems to be Solved by the Invention] In the grip having such a configuration, the grip skin member 24 needs to be sewn by hand, which makes the sewing work complicated and takes a lot of time, resulting in poor work efficiency. There are many problems in mass production, such as poor production and extremely low productivity, and the need for skill in sewing.

Furthermore, as shown in FIG. 3, there are many uneven seams in the sewn portion a of the grip skin member 24, and when the driver operates the parking brake, his or her fingers or palm gripping the grip portion 20 may hit these uneven portions. It has the problem of causing discomfort and pain.

The present invention solves the above-mentioned problems, and its purpose is to develop a grip that has high production efficiency and that allows even non-skilled workers to manufacture high-quality grips with an excellent feel of operation with high productivity. The purpose is to provide a manufacturing method.

[Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention provides a method for manufacturing a grip, which comprises covering the surface of a grip core member made of resin or rubber with a grip skin member such as leather or cloth. The method is characterized by including the following steps (a) to (c).

(a) A clip skin portion having a predetermined bag-like or cylindrical shape is sewn in advance.

(b) Next, the grip skin is placed in a predetermined position inside the grip mold.

(c) A resin or rubber is injected into the inside of the grip mold, and a grip core member is integrally molded inside the grip skin member.

[Function] According to the manufacturing method of the above-mentioned configuration, the grip skin member can be sewn mechanically using a sewing machine or the like in advance, which greatly improves work efficiency compared to conventional hand sewing. I can do it. Moreover, by simply inserting the sewn grip skin member inside the grip mold,
Since the grip skin member and the grip core member can be integrally formed, production efficiency can be dramatically improved.

In addition, these sewing and molding processes do not require special skill, unlike the conventional grip skin member wrapping and bonding process and sewing process, so even non-skilled people can easily make the grip. In this respect as well, improvements in productivity can be achieved.

Furthermore, as mentioned above, insert molding allows the grip core member and the grip skin member to be integrally formed, so the tension of the grip skin member is uniform and there is no unevenness in the seams. It feels great when you hold it, and it also looks sleek.
It can give a feeling of 1.

[Example] Next, please refer to the drawings for a preferred embodiment of the present invention! ! I will explain in detail while using G.

FIG. 1 is an explanatory cross-sectional view that does not show the molding process when the present invention is applied to a grip of a parking brake operating lever.

The grip molding die 40 shown in the figure includes divided molds 42a and 42b that define the outer shape of the grip portion 30, and the divided molds 42a and 42b.
It is comprised of a hot runner mold 44 for injecting molten resin into the interiors of the grip portions 42a and 42b, and a core 46 for forming a hollow portion within the grip portion 30.

The split molds 42a and 42b are configured to be able to be moved in the vertical direction in FIG. 1 by driving means (not shown). Further, at the bottom of the split molds 42a and 42b, there is a recess 42c in which the tip 46a of the core 46 is accommodated.
is formed.

The hot runner mold 44 is configured to be movable in the horizontal direction in FIG. 1 by a driving means (not shown), and is arranged so as to close the open ends of the split molds 42a and 42b during molding. And this hot runner type 44
Resin supply channels 44a and 44b are formed for supplying molten resin into the split molds 42a and 42b, and furthermore, a recess 44C for fixedly supporting the core 46 is formed at the end thereof.
is formed.

Next, the grip part 30 is molded using the grip mold 40.
The process of molding will be explained in detail.

(a) First, the cylindrical grip skin member 34 is sewn in advance using a sewing machine or the like. The grip skin member 34 is made of a leather material such as natural leather, artificial leather, and synthetic leather, or a cloth-like material.

(b) Next, this grip skin member 34 is placed at a predetermined position in the grip mold 40 with the seam allowance inside.

That is, first, the hot runner mold 44 is evacuated, and the core 4 supported and fixed on the hot runner mold 44 is removed.
6, the grip skin member 34 is temporarily fixed. In this embodiment, the tip 34a of the grip skin member 34 is folded inward, and the folded portion is temporarily fixed to the core 46 by a ring-shaped fastener 48.

Next, the hot runner mold 44 is moved to the left in FIG. 1, and when the tip 46a of the core 46 supported and fixed to the hot runner mold 44 is accommodated in the recesses 42c of the split molds 42a and 42b. to stop the movement. In this state, the grip skin member 34 is divided into the split type 42a,
42b, and the base end 34b of the grip skin member 34 is held between the split molds 42a, 42b and the hot runner mold 44.

(c) Next, the resin supply path 44 of the hot runner mold 44
Molten resin is injected into the split molds 42a and 42b via a and 44b to form the grip core member 32. Note that the type of resin used is not particularly limited, and any type of resin, foamable or non-foamable, can be used.
The pressure during injection is set depending on the type and type of resin used.

(d) When the molding of the grip core member 32 is completed, the split molds 42a and 42b are separated and the hot runner
The mold 44 is retracted and the molded grip portion 30 is inserted into the core 4.
6, a cylindrical grip part 30 having a hollow part for rod insertion along the central axis is formed. Note that the base end portion 34b of the grip skin member 34 is attached to the grip core member 32 by adhesive, thermal welding, etc., as necessary.
fixed processing.

Next, the operation of this embodiment will be explained.

According to the manufacturing method having the above configuration, the grip skin member 3
4 can be sewn mechanically using a sewing machine or the like, so work efficiency can be greatly improved compared to conventional hand sewing.

Moreover, the grip skin member 34 is attached to the grip forming mold 40.
By simply inserting it inside the split molds 42a and 42b that make up the grip skin member 34 and the grip core member 3,
2 can be integrally formed, and a complicated bonding process for wrapping the grip skin member 34 is not necessary, so that production efficiency can be dramatically improved in this respect as well.

Further, wrapping the grip skin member in the conventional grip does not require skill unlike the adhesion process and the sewing process, and even an unskilled person can easily manufacture the grip.

Furthermore, since the grip core member 32 and the grip skin member 34 can be integrally formed by the insert bottom shape, the tension of the grip skin member 34 is uniform and there are no irregularities in the seams, as shown in FIG. As a result, the grip portion 30 has an excellent tactile feel when gripped, and can also provide a visually refreshing and smooth feeling.

Although one embodiment of the present invention has been described above, the present invention is not limited thereto, and various modifications can be made within the scope of the gist of the invention.

For example, in the embodiment described above, the case where the present invention is applied to the grip of a parking brake operating lever has been described, but the present invention is not limited to this, but can also be applied to a grip of a gear shift I lever, etc. .

0 Furthermore, the material constituting the grip core member 32 is not limited to resin, and rubber or the like may also be used.

[Effects of the Invention] According to the present invention, a high-quality grip with an excellent operability feeling can be manufactured with high production efficiency even by an unskilled person without requiring a manual sewing process of the grip skin member. Thus, it is possible to provide a grip manufacturing method that can significantly improve productivity and reduce costs.

[Brief explanation of drawings]

FIG. 1 is an explanatory cross-sectional view showing a preferred embodiment of the present invention, FIG. 2 is an explanatory perspective view showing a state in which a grip obtained by the present invention is attached to a lever body, and FIG. FIG. 4 is an explanatory perspective view showing an example of a conventional operating lever, and FIG. 4 is an explanatory cross-sectional view taken along the line IV-IV in FIG. 3. 30・Grip part, 1] 32... Grip 34... Grip 40... Grip 42a, 4 44... Hola

Claims (1)

[Claims] (1) In a method for manufacturing a grip comprising a grip core member made of resin or rubber and covered with a leather or cloth-like grip skin member, the following steps (a) to
A method for manufacturing a grip, comprising (c). (a) A grip skin member having a predetermined bag-like or cylindrical shape is sewn in advance. (b) Next, this grip skin member is placed at a predetermined position inside the grip mold. (c) A resin or rubber is injected into the inside of the grip mold, and a grip core member is integrally molded inside the grip skin member.